The bidirectional approach
is able to exploit
both future
and past information
in the input
of the recurrent
neural network
that’s why
it is more efficient.
By the way
it is natural
as human reasoning
because we need
past and future
to compute
the solution
of a problem.
This is the combination
of memory
and intelligence
in our mind
and also
our way
to belong
to Mankind.